Patents by Inventor Robert Gutbrod

Robert Gutbrod has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Solids dispersions which can be easily distributed in hydrophobic and hydrophilic media and are stable to flocculation, and their use
    Patent number: 4443263
    Abstract: Stable dispersions of solids, especially pigments, are obtained by distributing a solid having acidic groups on its surface in a liquid medium comprising an amine having at least one aliphatic chain of more than 5 carbon atoms, a non-ionic and/or an anionic surfactant having one or more aliphatic chains with a total of more than 5 carbon atoms and an organic water-miscible solvent. These dispersions are easily distributable in hydrophobic and in hydrophilic systems.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: April 17, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erwin Dietz, Michael Maikowski, Robert Gutbrod
  • Pigment dispersions and their use for the pigmenting of hydrophilic and hydrophobic media
    Patent number: 4219365
    Abstract: Stable dispersions of pigments are obtained by finely distributing inorganic and/or organic pigments in water and/or agents preventing or retarding the drying-up of the dispersions containing condensation products of aromatic hydroxy compounds and alkanals as well as surfactants, said condensation products and surfactants containing aliphatic carbon chains of more than 5 carbon atoms. The dispersions are compatible with hydrophilic and hydrophobic media.
    Type: Grant
    Filed: December 27, 1978
    Date of Patent: August 26, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erwin Dietz, Max Grossmann, Robert Gutbrod, Michael Maikowski
  • Pigment preparations
    Patent number: 4217265
    Abstract: Easily dispersible preparations of organic pigments are obtained by coating the pigment particles with essentially colorless aromatic compounds having a molecular structure being similar to that of the pigment and having an aliphatic chain of more than 5 carbon atoms. These preparations are stable to flocculation and useful for pigmenting hydrophilic and hydrophobic media.
    Type: Grant
    Filed: July 6, 1978
    Date of Patent: August 12, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erwin Dietz, Otto Fuchs, Robert Gutbrod, Adolf Kroh, Michael Maikowski
  • Pigment dispersion for use in hydrophilic and hydrophobic media
    Patent number: 4156616
    Abstract: Dispersions of inorganic and organic pigments containing an alkylene oxide adduct on long-chain aliphatic amines and an anionic surfactant having an aliphatic radical of 3 to 40 carbon atoms can easily be distributed in hydrophilic and hydrophobic media and yield colorations of high tinctorial strength and purity of shade.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: May 29, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Erwin Dietz, Robert Gutbrod, Michael Maikowski